Chlamydopsis doutti Caterino, 2007

Barman, E. H., Michat, M. C., Alarie, Y. & Wolfe, G. W., 2007, Figs. 16 – 17. 16 in A Description of the First Instar of Hoperius planatus Fall, 1927 (Coleoptera: Dytiscidae: Colymbetinae: Colymbetini), with Phylogenetic Implications, The Coleopterists Bulletin 61 (3), pp. 327-333 : 327-333

Chlamydopsis doutti Caterino , New Species

( Figs. 1C, D )

Holotype female. [ Australia]: ‘‘C.QLD, 22 ° 02 9 S, 148 ° 03 9 E,Moranbah, 6km S, 5046, 25Jun-20Dec 1997, G.Monteith & E.Knuck, Flt Intercept’ ’; deposited in QMB; QMT144173 .

Diagnosis. This species is a member of the Chlamydopsis epipleuralis group (Caterino 2003). It is similar to C. epipleuralis Lea , C. sculptus Oke and C. convexa Caterino in its general shape and trichome structure. It is particularly similar, and closely related, to C. convexa , both having strongly convex anterior, and to a lesser degree posterior, elevations of the humeral trichome. Chlamydopsis doutti is easily separated by the near complete reduction of the circular opening lateral to the meeting point of the anterior and posterior elevations ( Fig. 1 ). It is further distinguished by the more mesal position, and the slightly sinuate shape, of the anterior humeral groove, which continues posteriorly a short distance beyond the trichome opening.

Description. L: 2.18; W: 1.50; E/Pn L: 1.80; E/Pn W: 1.20; Pn W/L: 1.60; E L/W: 0.94; Pr/Py: 1.41; Sterna: 0.56, 0.12, 0.62; Tibiae: 0.69, 0.72, 0.78. Body rufous, mostly shining, but most surfaces variably punctate, with more densely punctate areas appearing less so; subquadrate, approximately parallel sided, slightly less than twice as long as wide; head with frons flat, nearly square, with the lateral edges weakly elevated, bearing medium-sized, but very shallow, inconspicuous punctures, separated by about their widths, the intervening integument with reticulate microsculpture, faintly shining, with few extremely fine setae; labrum rounded, with few inconspicuous setae, more rugose and finely punctate than frons; antennal scapes rather roundly triangular, the inner and outer distal edges slightly longer than the outer basal edge, textured as frons; antennal club (of female) about two-thirds as long as scape, fairly sparsely setose, with more densely setose patches near the apex of the anterior surface.

Pronotum subcordate, posterolateral angles rounded, the sides short, slightly divergent anterad; lateral and anterior pronotal margins elevated, the anterior margin tripartite, weakly angulate on either side above antennal insertions; pronotal disc strongly convex at middle, weakly depressed on either side behind apex and near posterior corners, descending at middle to scutellum. Basal half of elytron dominated by humeral trichomes, their anterior and posterior elevations strongly convex, narrowed to their junction, slightly separated, with the opposing faces densely setose; the anterior humeral groove of the trichome deeply impressed, sinuate, extending posterad from the humeral corner of the elytron along the base of the anterior trichome elevation, continuing past the trichome junction along the outer base of the posterior elevation, the groove’s inner surface microgranulose; outside the humeral groove, the anterolateralmost elytral corner depressed immediately next to groove, elevated and convex at side; elytra shallowly depressed between trichomes along elytral suture, but very deeply depressed beneath trichome junction; posterior half of elytron convex along suture and behind trichome, depressed along the posterolateral margin; elytron with marginal stria complete along lateral and posterior edges, departing from margin slightly above metafemoral arc, extending forward along basal one-third of suture; elytron finely and rather densely punctate on anterior elevation and in anterolateral corners, more coarsely, though shallowly punctate on posterior half of disc and epipleuron, the epipleural punctures elongated and converging toward trichome opening.

Prosternum with anterior margin deeply grooved, the groove diverging from margin toward sides, meeting the supracoxal groove; lower edge of marginal groove angulately projecting on either side; prosternal keel faintly convex, narrowed posterad, shallowly emarginate at base, disc evenly covered with small shallow punctures separated by slightly less than their widths, finely microsculptured between; mesosternum about one-fourth as long wide along midline, 332 weakly projecting at middle, lacking anterior or lateral marginal stria; mesometasternal suture shallowly, finely depressed, but lacking stria; metasternum weakly convex, median suture nearly obsolete anteriorly, strongly depressed behind mesocoxae, the depression margined on metasternum but not metepisternum; leg depression on 1st abdominal ventrite margined at middle, but only about half way to epipleuron laterally; entire venter uniformly punctate, punctures of the abdomen slightly finer and sparser.

Outer surface of profemur with oblique carina where it is overlapped by the mesofemur in repose; protibia slender, angulate on outer margin about one-third from base; outer surfaces of profemur and protibia with fine sparse punctures; meso- and metafemora short, the anterior edge of the latter weakly rounded, unmargined on anterior and posterior edges; mesotibia slender, angulate onethird from base; metatibia similar, slightly broader.

Propygidium large, about as long as broad, sparsely punctate with faint microsculpture between punctures; pygidium about two/thirds as long as propygidium along midline, similar in texture, with punctures becoming finer and sparser to apex.

Remarks. I am pleased to name this species for Dr. Richard L. Doutt, on the occasion of his 90th birthday, in recognition of his lifelong dedication to entomological science, and his strong support of entomology at the Santa Barbara Museum of Natural History.

Figures

Fig. 1. Lateral (A) and dorsal (B) views of Chlamydopsis chadster, new species; lateral